Abby O'Brien is a fictional character from the Hallmark Channel series, Chesapeake Shores. She is portrayed as a successful businesswoman who returns to her hometown to reconnect with her family and confront her past. Abby is known for her strong-willed personality and dedication to her career, often balancing her professional life with personal challenges. In the series, Abby navigates complex relationships, including those with her sisters and her childhood love, Trace Riley. Her journey emphasizes themes of family, love, and self-discovery, making her a relatable character for many viewers.